Hebrews 9:28 “So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.”
This is a powerful verse, along with the two verses before it. In these verses, Paul deals with the argument about people thinking that you can lose your salvation.
In verse 26, he points out that if Christ’s death on the cross was not sufficient to guarantee you a place in Heaven, then Jesus would have to die more than once. Of course, that is not going to happen. God knew what is necessary to get us to Heaven
The truth is, if it depended on us to ensure our salvation – none of us would be saved. Also, we would not need a Savior, either. We are all still sinners, even though saved. Hopefully, as you grow in Christ, you should be sinning less and less.
Among Jesus’ last words on the Cross, He said: “It is finished!” This simple phrase meant that our redemption had been accomplished once we merely believe on what He did for us. Nothing needs to be added to it, and nothing can be added to God’s perfect redemption. The only qualification for salvation is found in Acts 16:31: “Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.”
Because of what Jesus did for us, we can know that we have eternal life. In simple faith, those looking to go to Heaven one day by trusting Jesus alone, will find that when He comes back – He will not have a record of any of our sins since salvation with Him – thus guaranteeing our salvation.